Struct SequencerView 

pub struct SequencerView {
    pub band: SeqBand,
    pub knob: usize,
    pub locked: bool,
    pub copy_from: Option<u8>,
    pub digits: String,
}

The step grid’s cursor: which band, which control inside it, and whether that control has been locked with Enter.

Nothing here is part of a pattern. It is the same separation the piano roll keeps — PianoRollState holds a column and a focus level, the clip holds the notes.

Fields

band: SeqBand

knob: usize

Which control inside SequencerView::band the cursor is on.

locked: bool

Enter was pressed on a control: h/l now adjust it and nothing else gets a look at the key. The fader’s contract, applied to a knob.

copy_from: Option<u8>

The slot y picked up, for p to paste.

digits: String

Digits typed towards a step or slot number.

Implementations

impl SequencerView

pub fn new() -> Self

pub fn move_band(&mut self, delta: i32)

Move to another band, giving up the lock and the digit buffer with it.

pub fn focus_band(&mut self, band: SeqBand)

Put the cursor on a band directly, as opening the view does.

pub fn move_knob(&mut self, delta: i32, count: usize)

Move the cursor between the controls of the current band. Clamped: walking off the end of a knob row and reappearing at the other end is how a value gets changed by accident.

pub fn type_digit(&mut self, ch: char, max: usize) -> Option<usize>

Type a digit towards a number in 1..=max, and say which one was named once it can no longer grow.

The piano roll’s rule, because a step grid has the same problem: 1 on a 16-step pattern might be step 1 or the front of step 12.

Trait Implementations

impl Clone for SequencerView

fn clone(&self) -> SequencerView

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SequencerView

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SequencerView

fn default() -> SequencerView

Returns the “default value” for a type.

impl Eq for SequencerView

impl PartialEq for SequencerView

fn eq(&self, other: &SequencerView) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SequencerView